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add with as method #2

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add with as method #2

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17 changes: 9 additions & 8 deletions 02_2-led_blink/led_blink.py
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Original file line number Diff line number Diff line change
Expand Up @@ -20,18 +20,19 @@
GPIO.setmode(GPIO.BOARD)
GPIO.setup(LED_PIN, GPIO.OUT)

try:
class control_GPIO:
def __enter__(self):
pass
def __exit__(self,type, value, trace):
print("Exception: KeyboardInterrupt")
GPIO.cleanup()

with control_GPIO():
while True:
print("LED is on")
GPIO.output(LED_PIN, GPIO.HIGH)
time.sleep(1)

print("LED is off")
GPIO.output(LED_PIN, GPIO.LOW)
time.sleep(1)

except KeyboardInterrupt:
print("Exception: KeyboardInterrupt")

finally:
GPIO.cleanup()
time.sleep(1)